Abstract
Chronic stress has a negative influence on health. The
aim was to determine stress reducing effects of yoghurt
enriched with bioactive components as compared to normal
yoghurt. High-trait anxiety individuals (n = 67) aged
18-63 years participated in a randomized,
placebo-controlled, double-blinded intervention with
parallel groups. They received either yoghurt enriched
with alpha-lactalbumin, casein tripeptides and B vitamins
(active) or isoenergetic standard yoghurt (control). To
detect changes in psychological and physiological stress,
State-Trait Anxiety Inventory, Profile of Mood States,
salivary cortisol, inflammatory markers, blood pressure,
heart rate variability (HRV) and actigraphy were
monitored. We observed higher ratings of vigor (p =
0.047) and reduced feeling of inefficiency (p = 0.048) in
the active group. HRV (baseline adjusted mean 49.1 ± 2.3
ms) and recovery index (106.6 ± 33.4) were higher in the
active group than in controls (42.5 ± 2.2 ms and 80.0 ±
29.3) (p = 0.046 and p = 0.02, respectively). In
conclusion, daily intake of yoghurt enriched with
bioactive components may aid in stress coping.
Original language | English |
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Pages (from-to) | 507-514 |
Journal | International Journal of Food Sciences and Nutrition |
Volume | 65 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2014 |
MoE publication type | A1 Journal article-refereed |
Keywords
- alpha-lactalbumin
- bioactive peptides
- B vitamins
- sleep
- stress
- yoghurts